<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
       <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon>
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addGoodsForm"
               :rules="addGoodsFormRules"
               ref="addGoodsFormRef"
               label-width="100px"
               label-position="top">
        <el-tabs v-model="activeIndex"
                 :tab-position="'left'"
                 :before-leave="beforeTabChange"
                 @tab-click="tabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addGoodsForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addGoodsForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addGoodsForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addGoodsForm.goods_number" type="number"></el-input>
            </el-form-item>
            <!-- 级联选择器 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addGoodsForm.goods_cat"
                :options="cateList"
                :props="{ expandTrigger: 'hover',
                          value: 'cat_id',
                          label: 'cat_name',
                          children: 'children'
                         }"
                @change="handleChange" clearable>
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name"
                          v-for="item in manyTabData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="index1"
                             v-for="(index1, i) in item.attr_vals"
                             :key="i" border
                             size="mini"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name"
                          v-for="item in onlyTabData"
                          :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的接口地址 -->
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addGoodsForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialog"
      width="50%"
      class="previewPicture">
      <img :src="previewPic" alt="">
    </el-dialog>
  </div>
</template>

<script>
/* eslint-disable */
import _ from 'lodash'

export default {
  data() {
    return {
      //商品数据列表
      cateList: [],
      activeIndex: '0',
      //添加商品的表单验证对象
      addGoodsForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        //图片地址
        pics: [],
        //商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      //添加商品表单的验证规则
      addGoodsFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //动态参数列表的数据
      manyTabData: [],
      //静态属性列表的数据
      onlyTabData: [],
      //图片上传组件的请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPic: '',
      //控制图片显示隐藏对话框
      previewDialog: false
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    //获取所有商品分类的数据
    async getGoodsList() {
      const {data: res} = await this.$http.get('categories')
      if(res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
      console.log(this.cateList);
    },
    //级联选择器选中项变化触发
    handleChange() {
      if(this.addGoodsForm.goods_cat.length !== 3) {
        this.addGoodsForm.goods_cat = []
      }
    },
    beforeTabChange(activeName, oldActiveName) {
      if(oldActiveName === '0' && this.addGoodsForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClick() {
      if(this.activeIndex === '1') {
        //访问的是动态参数面板
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {sel: 'many'}
        })
        if(res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        console.log(res.data);
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        });
        this.manyTabData = res.data
      } else if(this.activeIndex === '2') {
        //访问的是静态属性面板
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {sel: 'only'}
        })
        if(res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        console.log(res.data);
        this.onlyTabData = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      console.log(file);
      this.previewPic = file.response.data.url
      this.previewDialog = true
    },
    //处理移除图片的操作
    handleRemove(file) {
      //1. 获取将要删除的图片临时路径
      const picTemp = file.response.data.tmp_path
      //2. 从pics中,找到这个图片对应的索引值
      const i = this.addGoodsForm.pics.findIndex(x => {
        return x.pic === picTemp
      })
      //3. 调用splice方法,把图片信息对象,从pics中移除
      this.addGoodsForm.pics.splice(i, 1)
    },
    //监听图片上传成功事件
    handleSuccess(response) {
      //1. 拼接得到一个图片信息对象
      const pic = {pic: response.data.tmp_path}
      //2. 将图片信息对象,push到pics中
      this.addGoodsForm.pics.push(pic)
      console.log(this.addGoodsForm.pics);
    },
    //添加商品
    add() {
      this.$refs.addGoodsFormRef.validate(async valid => {
        if(!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        //处理goods_cat数组
        const form = _.cloneDeep(this.addGoodsForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数和静态属性
        this.manyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addGoodsForm.attrs.push(newInfo)
        })
        this.onlyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addGoodsForm.attrs.push(newInfo)
        })
        form.attrs = this.addGoodsForm.attrs
        console.log(form);
        //执行添加业务逻辑
        const {data: res} = await this.$http.post('goods', form)
        if(res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        //通过路由导航 跳转到goods页面
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if(this.addGoodsForm.goods_cat.length === 3) {
        return this.addGoodsForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewPicture img {
  width: 100%;
}
</style>
